Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9796222 | Materials Science and Engineering: A | 2005 | 11 Pages |
Abstract
Samples of pure aluminum and an Al-6061 alloy were subjected to equal-channel angular pressing (ECAP) for up to eight passes at room temperature. The Vickers microhardness was recorded on the polished cross-sections of each as-pressed billet and the results are plotted in the form of color-coded maps to provide a pictorial depiction of the hardness distributions throughout the cross-sections. The results show the hardness increases by a factor of â¼2 in the first pass through the die but thereafter there is only a minor increase. The microhardness distribution is homogeneous in the unpressed condition but becomes inhomogeneous after a single pass and then reasonably homogeneous in subsequent passes. The results reveal some differences between the behavior of pure Al and the Al-6061 alloy. These results and microscopic observations are used to develop a model for the process of grain refinement during ECAP.
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Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Cheng Xu, Minoru Furukawa, Zenji Horita, Terence G. Langdon,